Is o la t e d Tra n s fo rm e r Drive r
fo r P CMCIA Ap p lic a t io n s
ISOLATION
BARRIER
V
IN
5V
C1
MAX845
0.1µF
6
V
CC
1N5817
1N5817
ICT:1.3CT
ISO 5V
C4
1
8
2
D1
IN
OUT
C3
C2
0.1µF
2.2µF
2.2µF
4
MAX883
MAX845
ON / OFF
SD
8
3
D2
FS
SET
GND SHDN
N.C.
GND1 GND2
6
4
5
2
7
3.3k
PC410 / 417
6
5
*74HC04
*74HC04
390Ω
1
DI
3.3k
8
3
4
3
PC357T
4
V
CC
DI
390Ω
6
1
4
A
B
DE
MAX481
MAX483
MAX485
MAX487
3
1
485
I/O
DE
RO
2
PC410 / 417
3.3k
6
5
*74HC04
7
390Ω
1
RO
RE
GND
2
5
4
3
*74HC04 OR EQUIVALENT
Figure 9. Typical RS-485 Application Circuit
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